Sensor simulation automatic calibration method of device ageing screening lathe

A device aging and automatic calibration technology, which is applied in the direction of instruments, measuring devices, measuring electronics, etc., can solve the problems of inability to use ordinary calibration methods, poor accuracy, and low efficiency, and achieve the effect of improving work efficiency, calibration accuracy, and reducing labor force

Inactive Publication Date: 2009-10-07
SHANGHAI ELECTRICAL AUTOMATION R&D INST
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Problems solved by technology

The speed is slow, the efficiency is low, the accuracy is poor, and the aging scree...

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  • Sensor simulation automatic calibration method of device ageing screening lathe

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with accompanying drawing.

[0024] see figure 1 , the figure shows a sensor simulation automatic calibration method of a device aging screening vehicle of the present invention, which is realized by several channels that need to be calibrated, sensors, analog resistance circuits connected in series with the sensors, calibration units and calibration systems, sensors and simulation The resistance circuit is connected in series under the same constant current power supply circuit, and the value of the constant current power supply circuit is 0.5mA, including the following steps:

[0025] Step 1, adjust the working environment temperature of the aging screening car, and adjust the working environment temperature of the aging screening car to the standard temperature T S , the standard temperature Ts = 25 ℃, the accuracy is ± 0.1 ℃;

[0026] Step 2, the standard temperature T S Enter the calibration un...

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Abstract

The invention discloses a sensor simulation automatic calibration method of a device ageing screening lathe, which comprises the following steps: regulating the operating ambient temperature of the ageing screening lathe into the standard temperature TS; inputting the standard temperature TS as a setting value into a calibration unit; collecting a voltage signal VA of a sensor of one channel and obtaining the corresponding temperature T0; inputting the standard temperature TS into a simulative resistance circuit and obtaining a voltage signal VB input by the simulative resistance circuit; sampling an error signal DeltaV between the voltage signal VA and the voltage signal VB and obtaining the corresponding regulation temperature TDelta; storing the regulation temperature TDelta as a correct value in a calibration system of the channel for calibration; judging whether all channels are calibrated; and finishing the calibration. The invention can calibrate automatically and greatly improves the working efficiency and the calibration precision.

Description

technical field [0001] The invention relates to an automatic calibration method, in particular to a sensor simulation automatic calibration method for a component aging screening vehicle. technical background [0002] The device aging screening vehicle is a large-scale electronic control product production process, which is used for aging screening of various devices. Since the device aging screening is carried out under different temperature conditions, the temperature detection of each link is very important. Errors caused by sensor wiring and calculation and measurement will seriously affect the accuracy of temperature detection, and the calibration of temperature can greatly improve the accuracy of aging screening. [0003] The calibration method in the prior art is to manually adjust the variable resistor and manually input the correction value. The speed is slow, the efficiency is low, the accuracy is poor, and the aging screening vehicle has multiple sensors, which ...

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Application Information

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IPC IPC(8): G01R31/00G01R35/00
Inventor 李新育李红词陈冰朱蕴
Owner SHANGHAI ELECTRICAL AUTOMATION R&D INST
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